umit

Interceptors Are Functions Too

I could not agree more with my colleague and friend Travis Johnson's opinion that "[INTERCEPTORS ARE SO COOL][iasc]!" In that post, he succinctly describes the [Interceptor pattern][pattern] as used adroitly by [OkHttp][okhttp]. But, as is often the case, I believe a complicated object-oriented pattern obscures the simple functional gem within it.

What is an Interceptor?

I'll quote liberally from [OkHttp's documentation on the topic][okhttp-interceptor]:

Interceptors are a powerful mechanism that can monitor, rewrite, and retry calls. […] >

umit

help:  ## Display this help
	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m<target>\033[0m\n\nTargets:\n"} \
		/^[a-z0-9A-Z_-]+:.*?##/ { printf "  \033[36m%-10s\033[0m %s\n", $$1, $$2 }' $(MAKEFILE_LIST)
 
# Everything below is an example
 
target00:       ## This message will show up when typing 'make help'
	@echo does nothing
 

umit

public class LRUCache {

    private final Map<Integer, Node> map = new HashMap<>();
    private final int capacity;
    private Node head, tail;

    public LRUCache(int capacity) {
        this.capacity = capacity;
    }

umit

import (
	"encoding/json"
	"net/http"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/testcontainers/testcontainers-go"
	"github.com/testcontainers/testcontainers-go/wait"
)

umit

package main

import (
	"fmt"
	"time"
)

func main() {
	const numGreeters = 10

umit

type CountDownLatch struct {
   sync.WaitGroup
   counter uint64
}

func (cdl *CountDownLatch) Add(delta int) {
   cdl.WaitGroup.Add(delta)
   d := uint32(delta)
   atomic.AddUint64(&cdl.counter, combineUInt64For(d, d))
}

umit

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

umit

Things I believe

This is a collection of the things I believe about software development. I have worked for years building backend and data processing systems, so read the below within that context.

Agree? Disagree? Feel free to let me know at @JanStette. See also my blog at www.janvsmachine.net.

Fundamentals

Keep it simple, stupid. You ain't gonna need it.

umit

import (
	"cloud.google.com/go/pubsub"
	"context"
	"fmt"
	"github.com/testcontainers/testcontainers-go/wait"
	"log"
	"net/http"
	"os"
	"time"

umit

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.net.Socket;

public final class BasicTcpClient implements AutoCloseable {

    private static final int READ_BUF_LEN = 4096;

    private final Socket socket;